The Correlation of Soil Organic Carbon Content of Long-term Fertilization and Climate Factors

Based on the date of soil organic carbon contents of different treatments and climate factors of long- term fertilization from 1995 to 2006, the correlations of each climate factor and organic carbon content of different treatments were analyzed. The results showed that the change of month average temperature during the trophic growth stage had more influence on the soil organic carbon content. It had obvious correlation with the treatment that using organic manure. It's better for accumulating of organic carbon if the difference in temperature was larger during the generative growth stage. The correlation of per month precipitation and organic carbon content was basically negative. It's disadvantaged for accumulating of organic carbon when increasing precipitation during the seedling stage and milk mature stage. Increasing the sunlight hours could enhance the organic carbon content, and its effect on generative growth stage increased. In general, the influence of climate factors was much obvious on soil organic carbon content of no organic manure treatments, especially the CK treatment. The organic carbon content of using organic manure treatments was only influenced by climate factors during the trophic growth stage.